I just want to remind you that you can play almost every single DS game on the 3DS as well! If you can consider getting one of those you have literally thousands of games!!!
I don't own a 3DS myself but I can list the games I am interested in:
Zelda: OoT (if you never played this you simply have to get it, you're not a true gamer until you've tried it)
Star Fox 64 3D (stupid name, but looks like great fun!)
Kid Icarus UR
NSMB2
Mario 3D Land
Mario Kart 7
Castlevania: Mirror of Fate (or whatevz it's called)
Heroes of Ruin (Kinda like Diablo...)
Other games that might be of your liking:
Donkey Kong Country Returns (coming this year, and although it's a port the original game got great reviews!)
Resident Evil Revelations (it's getting ported to PS360U - but this is the original!)
Fire Emblem Awakening (Just look at dem reviews!)
Kingdom Hearts
Pokémon X/Y
Luigi's Mansion
Monster Hunter 3
Animal Crossing NL
Project X Zone
Old DS games that might be of interest:
Super Mario 64 DS (classic platformer)
NSMB
Chrono Trigger
Mario Kart DS
Lots of Pokémons
More Animal Crossing
A few more Zeldas
Final Fantasy IV
And then you got a shit load of eShop titles as well...
I'm on Twitter @DanneSandin!
Furthermore, I think VGChartz should add a "Like"-button.
